I like Bisanga's work, but 7 Euros / Graft is too much in my eyes. As already mentioned, there are other very good doctors who are much cheaper. In addition, one should not forget that the cost of living and accordingly the wages in Belgium, Germany or France are much lower than in the U.S., the price is equivalent to 10 or 11 Euros in the U.S.
Of course, it is Bisanga's right to set the price so high.